Answer:
10. F.
11. A.
12. F.
Step-by-step explanation:
10.
(5x + 6) + (-x + 8) = 5x - x + 6 + 8 = (5x - x) + (6 + 8) = 4x + 14
11.
We have w x blocks and 4 "unit" blocks, so it represents 4x + 4
12.
45xy = 9x*5y; 18x = 9x*2, also there is no GCF of 5y and 2, so answer F is correct.
G. 9y is not divisible by 9x
H. 19x is not divisible by 9x
J. x is not divisible by 9x
